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Ibn Sina, Agdal Rabat, Morocco alhoucineboutahar@gmail.com, bk.elbikri@ um5s.net.ma, crbenamar@emi.ac.ma Keywords: Non-linear vibrations, functionally graded materials, Annular plates.
Furthermore, functionally graded materials can be designed to achieve particular desired properties and the gradation in properties of the material can optimize stress distribution.
The continuity in the material properties of these new materials provides better mechanical behavior in comparison with the fiber-reinforced composites.
Woo et al. [12] provided an analytical solution for the nonlinear free vibration behavior of plates made of functionally graded materials.
[3] J.N.Reddy, Zhen-Qiang Cheng, Frequency correspondence between membranes and functionally graded spherical shallow shells of polygonal plan form, International Journal of Mechanical Sciences 44 (2002) 967–985

Electroless nickels have been used in practical applications as versatile materials for anti-wear.
Composite platting offers various mechanical and electoronic functions, depending on the combination of a material matrix and particles deposited.
Introduction Composite plating offers various mechanical and electro functions, depending on the combination of a material matrix and particles deposited.
Takano: Properties of Electroless Ni-P-SiC Composite Coatings, Journal of the Surface Finishing Society of Japan, Vol. 41 (1990), p. 407
Tomioka: Effect of Acid Washing of SiC Particles on Dispersing and Friction Properties of Ni-P-SiC Composite Plating, Engineering Tribology and Materials, Vol. 739 (2017), p. 143

These properties make these materials ideal candidates for photovoltaic applications [5-7].
Sun, Structural, optical and electrical properties of Fe-doped SnO2 fabricated by sol-gel dip coating technique, Materials Science in Semiconductor Processing, 13 (2010) 125-131 [2] B.
Rahal, Optical and Structural Characterization of Fluorine-Doped SnO2 Thin Films Prepared by Spray Ultrasonic, Journal of New Technology and Materials 04, (2014) 106-111 [22] A.E.
Kamoun-Turki, Structural, Optical, and Electrical Properties of SnS:Ag Thin Films, Journal of Electronic Materials, 44 (2015), 4392-4399 [30] A.
Turki-Kamoun, Effects of Al content on physical properties of ZnS thin films prepared by chemical bath deposition, Journal of Materials Science: Materials in Electronics, 26 (2015) 8854-8862 [37] A.

Introduction Porous ceramic materials with both low and high temperature applications are of great interest today (insulators, catalyst supports, filters, ceramic membrane etc.).
Mullite is one of the most important porous support materials [2].
[2] Fengkun Yang, Cuiwei Li, Yamei Lin, Chang-An Wang, Effects of sintering temperature on properties of porous mullite/corundum ceramics, Materials Letters. 73 (2012) 36–39
Ekanem, Characterisation and optimisation of deferration of Kankara clay, ARPN Journal of Engineering and Applied Sciences. 2(2007) 60-74
El-maghraby, Characterization and assessment of Saudi clays raw material at different area, Arabian Journal of Chemistry. 3(2010)271–277

Materials and Methods Alginate microspheres were prepared using emulsification/gelation method [17, 19].
Khan, Alginate and its versatile application in drug delivery, Journal of Pharmaceutical Sciences and Research, 9 (2017) 606
Monaghan, Lactoferrin-loaded alginate microparticles to target Clostridioides difficile infection, Journal of pharmaceutical sciences, 108 (2019) 2438-2446
Oldinski, Dual-crosslinked homogeneous alginate microspheres for mesenchymal stem cell encapsulation, Journal of Materials Science: Materials in Medicine, 29 (2018) 1-10
Park, Preparation of alginate–CaCl2 microspheres as resveratrol carriers, Journal of Materials Science, 49 (2014) 4612-4619.

Organic/Inorganic Hybrid Materials for Organic Electronic Application Liu Jiana, Liu Jieb, Leng Xinglongc and Qu Furongd Institute of microelectronics, Chinese Academy of Sciences/Devices and integrated technology, the Key Laboratory of microelectronics, Beijing 100029, China aliujian1@ime.ac.cn, bliujie@ime,ac.cn, clengxinglong@ime.ac.cn, dqufurong@ime.ac.cn Keywords: Organic electronic, Encapsulation, PECVD, Organic/Inorganic Alternative structure.
OLED, OPV and printed electronic devices usually contain active metal electrode, the functional materials of the device are more sensitive to water and oxygen, which can reduce the lifetime of the device through electrochemical reaction [2].
Ieee Journal of Selected Topics in Quantum Electronics 2004, 10, (1), 45-57
Progress in materials science 2003, 48, (1), 1-55
Journal of Vacuum Science & Technology a-Vacuum Surfaces and Films 1998, 16, (6), 3190-3198

It is also a cost effective and environmental friendly technique that can be adopted for processing number of engineering materials, particularly tough to cut materials such as ceramic reported [4].
Journal of material processing technology.
Journal of materials processing technology.
Optimization of abrasive water jet cutting of ductile materials.
Gazi University journal of science Volume (24) pp. 143-151.

Nanometer materials have novel physical, chemical and biological properties, which have gain wider application for pollution prevention, detection, monitoring and remediation of pollutants, such as heavy metals, inorganic and organic pollutants.
Many different nano scale materials have been explored for remediation.
A report mentioned that nanoscale materials could damage fish brains [10].
Bajpai, Nanotechnology for site remediation, Remediation Journal, 19 (2008) 99-108
Goho, Tiny trouble: nanoscale materials damage fish brains, Science news, 165 (2004) 211-211

Cost remains a major barrier to wider application of Si3N4 materials, and cheaper raw materials instead of expensive powder is an effective way to lower the cost [1].
References [1] Riley, F.L., Silicon Nitride and Related Materials.
Materials Science and Engineering: A, 2010. 527(6): p. 1314-1338
Journal of Materials Science, 2008. 44(1): p. 1-39
Metals and Materials International, 2014. 20(6): p. 1011-1016

The study of materials processed in centrifuges improves the understanding of the acceleration influence in the convection behavior in materials processing.
Wilcox: Materials Processing in High Gravity.
Bandeira: Materials Science Forum Vols. 727-728 (2012), p. 1633
Zeng: Materials Science and Engineering R Vol. 34 (1) (2001), p. 1
Min: Journal of Materials Science Letters Vol. 13 (1994), p. 1051.